I think sasuke know who tobi is and i believe zetsu have an important part to tobi power .I believe zetsu is part of tobi living out of him,that maybe why he ask zetsu to record battles for him.I think after zetsu do it task it reunite to tobi to feed him the information he saw and the abilities zetsu obsorb for it oponent it encounter.
When we saw sasuke kill zetsu ,his susano give a forward attack with it spear/arrow/sword against zetsu ,the same way that itachi give an forward attack again orichimaru and nagato to seal them.I got a feeling that the weapon sasuke use on zetsu did not kill him but it maybe did an ability to either to extract zetsu abilities or to control him in some kind of genjutsu
I think that what info zetsu give tobi about sasuke or other oponent sasuke might have it .
I just thinking it might not be true or it could be
MATURE PEOPLE SHARE YOUR VIEW .I NOT ASKING FOR HATERS / HYBRID HATERS TY
When we saw sasuke kill zetsu ,his susano give a forward attack with it spear/arrow/sword against zetsu ,the same way that itachi give an forward attack again orichimaru and nagato to seal them.I got a feeling that the weapon sasuke use on zetsu did not kill him but it maybe did an ability to either to extract zetsu abilities or to control him in some kind of genjutsu
I think that what info zetsu give tobi about sasuke or other oponent sasuke might have it .
I just thinking it might not be true or it could be
MATURE PEOPLE SHARE YOUR VIEW .I NOT ASKING FOR HATERS / HYBRID HATERS TY